Which agent is typically used in Class K fire extinguishers?

Class K fires, which occur primarily in commercial kitchens and involve cooking oils and fats, require specialized extinguishing agents to effectively suppress flames without causing re-ignition. The correct agent used in Class K fire extinguishers is wet chemical.

Wet chemical agents are specifically formulated to combat the unique characteristics of cooking fires, particularly those fueled by grease or oils. They work by creating a fine mist that cools the flames while also forming a barrier between the fuel and the oxygen, effectively stopping the fire's ability to burn. This unique dual-action makes wet chemicals the most appropriate choice for tackling such scenarios, as they can also prevent flare-ups that could occur from other extinguishing agents.

Other agents, such as water, foam, and dry powder, may not effectively address Class K fires. Water can spread grease fires, foam is better suited for flammable liquids, and dry powders may not provide the necessary chemical interaction to safely extinguish cooking oil fires. Therefore, wet chemical agents are essential for safe and effective fire suppression in kitchen environments.